community/InkCanvasForClass/MainWindow_cs/MW_InkReplay.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using Ink_Canvas.Helpers;

namespace Ink_Canvas {
    public partial class MainWindow : PerformanceTransparentWin {

        private void GridInkReplayButton_MouseUp(object sender, MouseButtonEventArgs e) {
            if (lastBorderMouseDownObject != sender) return;
            if (inkCanvas.Strokes.Count == 0) {
                HideSubPanels();
                return;
            };

            AnimationsHelper.HideWithSlideAndFade(BorderTools);
            AnimationsHelper.HideWithSlideAndFade(BoardBorderTools);

            CollapseBorderDrawShape();

            InkCanvasForInkReplay.Visibility = Visibility.Visible;
            InkCanvasGridForInkReplay.Visibility = Visibility.Hidden;
            InkCanvasGridForInkReplay.IsHitTestVisible = false;
            FloatingbarUIForInkReplay.Visibility = Visibility.Hidden;
            FloatingbarUIForInkReplay.IsHitTestVisible = false;
            BlackboardUIGridForInkReplay.Visibility = Visibility.Hidden;
            BlackboardUIGridForInkReplay.IsHitTestVisible = false;

            AnimationsHelper.ShowWithFadeIn(BorderInkReplayToolBox);
            InkReplayPanelStatusText.Text = "正在重播墨迹...";
            InkReplayPlayPauseBorder.Background = new SolidColorBrush(Colors.Transparent);
            InkReplayPlayButtonImage.Visibility = Visibility.Collapsed;
            InkReplayPauseButtonImage.Visibility = Visibility.Visible;

            isStopInkReplay = false;
            isPauseInkReplay = false;
            isRestartInkReplay = false;
            inkReplaySpeed = 1;
            InkCanvasForInkReplay.Strokes.Clear();
            var strokes = inkCanvas.Strokes.Clone();
            if (inkCanvas.GetSelectedStrokes().Count != 0) strokes = inkCanvas.GetSelectedStrokes().Clone();
            int k = 1, i = 0;
            new Thread(() => {
                isRestartInkReplay = true;
                while (isRestartInkReplay) {
                    isRestartInkReplay = false;
                    Application.Current.Dispatcher.Invoke(() => {
                        InkCanvasForInkReplay.Strokes.Clear();
                    });
                    foreach (var stroke in strokes) {

                        if (isRestartInkReplay) break;

                        var stylusPoints = new StylusPointCollection();
                        if (stroke.StylusPoints.Count == 629) //圆或椭圆
                        {
                            Stroke s = null;
                            foreach (var stylusPoint in stroke.StylusPoints) {

                                if (isRestartInkReplay) break;

                                while (isPauseInkReplay) {
                                    Thread.Sleep(10);
                                }

                                if (i++ >= 50) {
                                    i = 0;
                                    Thread.Sleep((int)(10 / inkReplaySpeed));
                                    if (isStopInkReplay) return;
                                }

                                Application.Current.Dispatcher.Invoke(() => {
                                    try {
                                        InkCanvasForInkReplay.Strokes.Remove(s);
                                    }
                                    catch { }

                                    stylusPoints.Add(stylusPoint);
                                    s = new Stroke(stylusPoints.Clone());
                                    s.DrawingAttributes = stroke.DrawingAttributes;
                                    InkCanvasForInkReplay.Strokes.Add(s);
                                });
                            }
                        } else {
                            Stroke s = null;
                            foreach (var stylusPoint in stroke.StylusPoints) {

                                if (isRestartInkReplay) break;

                                while (isPauseInkReplay) {
                                    Thread.Sleep(10);
                                }

                                if (i++ >= k) {
                                    i = 0;
                                    Thread.Sleep((int)(10 / inkReplaySpeed));
                                    if (isStopInkReplay) return;
                                }

                                Application.Current.Dispatcher.Invoke(() => {
                                    try {
                                        InkCanvasForInkReplay.Strokes.Remove(s);
                                    }
                                    catch { }

                                    stylusPoints.Add(stylusPoint);
                                    s = new Stroke(stylusPoints.Clone());
                                    s.DrawingAttributes = stroke.DrawingAttributes;
                                    InkCanvasForInkReplay.Strokes.Add(s);
                                });
                            }
                        }
                    }
                }

                Thread.Sleep(100);
                Application.Current.Dispatcher.Invoke(() => {
                    InkCanvasForInkReplay.Visibility = Visibility.Collapsed;
                    InkCanvasGridForInkReplay.Visibility = Visibility.Visible;
                    InkCanvasGridForInkReplay.IsHitTestVisible = true;
                    AnimationsHelper.HideWithFadeOut(BorderInkReplayToolBox);
                    FloatingbarUIForInkReplay.Visibility = Visibility.Visible;
                    FloatingbarUIForInkReplay.IsHitTestVisible = true;
                    BlackboardUIGridForInkReplay.Visibility = Visibility.Visible;
                    BlackboardUIGridForInkReplay.IsHitTestVisible = true;
                });
            }).Start();
        }

        #region 墨迹回放（旧版，等待重构）

        private bool isStopInkReplay = false;
        private bool isPauseInkReplay = false;
        private bool isRestartInkReplay = false;
        private double inkReplaySpeed = 1;

        private void InkCanvasForInkReplay_MouseDown(object sender, MouseButtonEventArgs e) {
            if (e.ClickCount == 2) {
                InkCanvasForInkReplay.Visibility = Visibility.Collapsed;
                InkCanvasGridForInkReplay.Visibility = Visibility.Visible;
                InkCanvasGridForInkReplay.IsHitTestVisible = true;
                FloatingbarUIForInkReplay.Visibility = Visibility.Visible;
                FloatingbarUIForInkReplay.IsHitTestVisible = true;
                BlackboardUIGridForInkReplay.Visibility = Visibility.Visible;
                BlackboardUIGridForInkReplay.IsHitTestVisible = true;
                AnimationsHelper.HideWithFadeOut(BorderInkReplayToolBox);
                isStopInkReplay = true;
            }
        }

        private void InkReplayPlayPauseBorder_OnMouseDown(object sender, MouseButtonEventArgs e) {
            InkReplayPlayPauseBorder.Background = new SolidColorBrush(Color.FromArgb(34, 9, 9, 11));
        }

        private void InkReplayPlayPauseBorder_OnMouseUp(object sender, MouseButtonEventArgs e)
        {
            InkReplayPlayPauseBorder.Background = new SolidColorBrush(Colors.Transparent);
            isPauseInkReplay = !isPauseInkReplay;
            InkReplayPanelStatusText.Text = isPauseInkReplay?"已暂停！":"正在重播墨迹...";
            InkReplayPlayButtonImage.Visibility = isPauseInkReplay ? Visibility.Visible: Visibility.Collapsed;
            InkReplayPauseButtonImage.Visibility = !isPauseInkReplay ? Visibility.Visible : Visibility.Collapsed;
        }

        private void InkReplayStopButtonBorder_OnMouseDown(object sender, MouseButtonEventArgs e)
        {
            InkReplayStopButtonBorder.Background = new SolidColorBrush(Color.FromArgb(34, 9, 9, 11));
        }

        private void InkReplayStopButtonBorder_OnMouseUp(object sender, MouseButtonEventArgs e)
        {
            InkReplayStopButtonBorder.Background = new SolidColorBrush(Colors.Transparent);
            InkCanvasForInkReplay.Visibility = Visibility.Collapsed;
            InkCanvasGridForInkReplay.Visibility = Visibility.Visible;
            InkCanvasGridForInkReplay.IsHitTestVisible = true;
            FloatingbarUIForInkReplay.Visibility = Visibility.Visible;
            FloatingbarUIForInkReplay.IsHitTestVisible = true;
            BlackboardUIGridForInkReplay.Visibility = Visibility.Visible;
            BlackboardUIGridForInkReplay.IsHitTestVisible = true;
            AnimationsHelper.HideWithFadeOut(BorderInkReplayToolBox);
            isStopInkReplay = true;
        }

        private void InkReplayReplayButtonBorder_OnMouseDown(object sender, MouseButtonEventArgs e)
        {
            InkReplayReplayButtonBorder.Background = new SolidColorBrush(Color.FromArgb(34, 9, 9, 11));
        }

        private void InkReplayReplayButtonBorder_OnMouseUp(object sender, MouseButtonEventArgs e)
        {
            InkReplayReplayButtonBorder.Background = new SolidColorBrush(Colors.Transparent);
            isRestartInkReplay = true;
            isPauseInkReplay = false;
            InkReplayPanelStatusText.Text = "正在重播墨迹...";
            InkReplayPlayButtonImage.Visibility = Visibility.Collapsed;
            InkReplayPauseButtonImage.Visibility = Visibility.Visible;
        }

        private void InkReplaySpeedButtonBorder_OnMouseDown(object sender, MouseButtonEventArgs e)
        {
            InkReplaySpeedButtonBorder.Background = new SolidColorBrush(Color.FromArgb(34, 9, 9, 11));
        }

        private void InkReplaySpeedButtonBorder_OnMouseUp(object sender, MouseButtonEventArgs e)
        {
            InkReplaySpeedButtonBorder.Background = new SolidColorBrush(Colors.Transparent);
            inkReplaySpeed = inkReplaySpeed == 0.5 ? 1 :
                inkReplaySpeed == 1 ? 2 :
                inkReplaySpeed == 2 ? 4 :
                inkReplaySpeed == 4 ? 8 : 0.5;
            InkReplaySpeedTextBlock.Text = inkReplaySpeed + "x";
        }

        #endregion

    }
}